Anonymous is not so anonymous anymore. The computer hackers, chat-room denizens and young people who make up the loosely affiliated Internet collective have drawn the attention of the FBI, the Department of Homeland Security and other federal investigators.
What was once a small group of pranksters has become a potential national security threat, federal officials say.

The FBI has carried out more than 75 raids and arrested 16 people this year in connection with illegal hacking claimed by Anonymous.